Massage gun



FIG. 1 is a front perspective view of massage gun, showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines in the drawings illustrate the portions of the massage gun, which form no part of the claimed design. 

CLAIM The ornamental design for massage gun, substantially as shown and described. 